HIVE-16384: Remove jdk7 build from travis
HIVE-16384: Remove jdk7 build from travis

anishek/hive,anishek/hive,nishantmonu51/hive,vineetgarg02/hive,jcamachor/hive,b-slim/hive,b-slim/hive,vineetgarg02/hive,nishantmonu51/hive,alanfgates/hive,sankarh/hive,lirui-apache/hive,vineetgarg02/hive,lirui-apache/hive,sankarh/hive,sankarh/hive,vineetgarg02/hive,anishek/hive,alanfgates/hive,anishek/hive,sankarh/hive,nishantmonu51/hive,vineetgarg02/hive,sankarh/hive,vineetgarg02/hive,b-slim/hive,nishantmonu51/hive,jcamachor/hive,vineetgarg02/hive,sankarh/hive,sankarh/hive,alanfgates/hive,jcamachor/hive,nishantmonu51/hive,sankarh/hive,lirui-apache/hive,alanfgates/hive,sankarh/hive,anishek/hive,alanfgates/hive,jcamachor/hive,alanfgates/hive,b-slim/hive,b-slim/hive,lirui-apache/hive,lirui-apache/hive,b-slim/hive,nishantmonu51/hive,nishantmonu51/hive,jcamachor/hive,jcamachor/hive,lirui-apache/hive,jcamachor/hive,b-slim/hive,nishantmonu51/hive,lirui-apache/hive,anishek/hive,nishantmonu51/hive,anishek/hive,vineetgarg02/hive,anishek/hive,b-slim/hive,anishek/hive,jcamachor/hive,vineetgarg02/hive,alanfgates/hive,alanfgates/hive,lirui-apache/hive,alanfgates/hive,lirui-apache/hive,jcamachor/hive,b-slim/hive